Racket version 8.11 is now available


Racket version 8.11 is now available from https://download.racket-lang.org/

Note: use raco pkg migrate 8.10 to update your packages

As of this release:

  • Match clauses can include a #:do option to allow evaluation of code and bindings before a following #:when clause. See match.

  • JSON Serialization supports indentation with an #:indent option to write-json. See write-json.

  • An initiate-sequence function simplifies the creation of sequences. See initiate-sequence.

  • The :do-in form allows an inner definition sequence. See :do-in.

  • The redex-define form allows pattern-matching in PLT Redex using a define-like syntax. See redex-define.

  • Racket and Chez Scheme use Robert L. Smith's "Algorithm 116" for division of complex numbers. See Robert L. Smith. 1962. Algorithm 116: Complex division. Commun. ACM 5, 8 (Aug. 1962), 435.

  • DrRacket has indentation guides that provide visual cues indicating how code is indented and grouped, accessible by using (<menu-key>-shift-i). See text:indent-guides<%>.

  • "Comment-out" menu items can be specific to the #lang used by the current file. See Comments.

  • Unused identifiers have a tooltip indicating that they have no bound occurrences.

  • Quickscript includes a new form of scripting in the form of "hook" functions that can be attached to existing events. See Hooks.

  • Plots include plot-inset and plot-legend-padding parameters to control the amount of space left unused around the plot edge and plot legend. See plot-inset.

  • There are many other documentation improvements, optimizations, and bug fixes!

Thank You

Thank you to the people who contributed to this release:

Alex Harsányi, Ben Greenman, Bogdan Popa, Cameron Moy, Camille d’Alméras, D. Ben Knoble, Efraim Flashner, Eric S. Raymond, Fred Fu, Greg Hendershott, Gustavo Massaccesi, Jay McCarthy, jim, Joel Dueck, John Clements, Jon Eskin, Laurent Orseau, Lucas Sta Maria, mAdkins, Mark Hedlund, Matteo d’Addio, Matthew Flatt, Matthias Felleisen, Mike Sperber, Noah Ma, Oscar Waddell, Philip McGrath, Qifan Wang, Robby Findler, Ross Angle, Ryan Culpepper, Sam Tobin-Hochstadt, shenleban tongying, Shu-Hung You, Sorawee Porncharoenwase, Stephen De Gabrielle, Wing Hei Chan, xxyzz, and ZhangHao

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Correction: have updated the link for

  • "Comment-out" menu items can be specific to the #lang used by the current file. See Comments.

Thank you to @shhyou :racket_heart: for the correction.

A note for users who build from source using pre-built packages:

Please wait for the 8.11.1 release while we resolve an issue with the install process.

We expect 8.11.1 to be ready within the next few weeks.

This issue does not affect other install methods.

Best regards,

Stephen :beetle: